Gas cookers; electric cookers; cooking units; heat pumps; metal tubes and flues for heating boilers; metal tubes and flues for plumbing systems; heating boilers; structural plates for ovens; bath heaters; refrigerators
Environmental Control ApparatusInstallation, maintenance, overhaul and repair of heating systems; installation, maintenance, overhaul and repair of gas apparatus; installation of gas apparatus; installation and repair of electric apparatus
Building Construction and Repair